f the first 15 multiples of 8.NCERT Class XMathematics - MathematicsChapter _ARITHMETIC PROGRESSIONS
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AP:8,16,24,.........
a=8
d=16-8=8
n=15
Sn=n/2(2a+(n-1)d)
S15=15/2(2*8+(15-1)8
=15/2(16+(14)8)
=15/2(16+112)
=15/2*128
=15*64
=960
Plzz mark brainliest
a=8
d=16-8=8
n=15
Sn=n/2(2a+(n-1)d)
S15=15/2(2*8+(15-1)8
=15/2(16+(14)8)
=15/2(16+112)
=15/2*128
=15*64
=960
Plzz mark brainliest
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