Assertion (A) : (1) + (1+2+4) + (4+6+9) + (9+12+16) + ... + (81+90+100) = 1000 Reason (R) : \sum^{n}_{r=1} (r^3-(r-1)^3) = n^3 for any natural number n

Correct Answer is : Both (A) and (R) are true and (R) is the collect explanation of (A)

Both (A) and (R) are true and (R) is the collect explanation of (A)

Both (A) and (R) are true but (R) is not the collect explanation of (A)

AP EAMCET Engineering 20 Apr 2019 Shift 1 Paper

Section: Mathematics

Question : 3 of 160

Marks: +1, -0

Assertion (A) : (1) + (1+2+4) + (4+6+9) + (9+12+16) + ... + (81+90+100) = 1000
Reason (R) :

r=1

(r3−(r−1)3) = n3 for any natural number n

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