Question : If a + b = 8, ab = 10, then the value of a3 + b3 is:
Option 1: 312
Option 2: 215
Option 3: 272
Option 4: 111
Latest: SSC CGL preparation tips to crack the exam
Don't Miss: SSC CGL complete guide
New: Unlock 10% OFF on PTE Academic. Use Code: 'C360SPL10'
Correct Answer: 272
Solution : Given: a + b = 8, ab = 10, We know that, (a + b) 3 = a 3 + b 3 + 3ab(a + b) ⇒ (8) 3 = a 3 + b 3 + 3 × 10 × 8 ⇒ 512 = a 3 + b 3 + 240 $\therefore$ a 3 + b 3 = 272 Hence, the correct answer is 272.
Candidates can download this ebook to know all about SSC CGL.
Answer Key | Eligibility | Application | Selection Process | Preparation Tips | Result | Admit Card
Question : If a3 + b3 = 152 and a + b = 8, then what is the value of ab?
Question : If (a – b) = 1, what is the value of (a3 – b3)?
Question : If 2a + 3b = 10 and ab = 3, then find the value of 4a2 + 9b2.
Question : What is the possible value of (a + b + c) – 3, if a2 + b2 + c2 = 9 and ab + bc + ca = 8?
Question : If (a – b) = 1 and ab = 6, then what is the value of (a3 – b3)?
Regular exam updates, QnA, Predictors, College Applications & E-books now on your Mobile