0.15+0.015+0.0015 +.......To 8 term .find the sum
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ᴴᴼᴾᴱ ᵀᴴᴵˢ ᴵˢ ᵀᴴᴱ ᴬᴺˢᵂᴱᴿ ......
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a=0.15,d=0.015-0.15=-0.135,n=8
sn=n/2(2a+(n-1)d)
=8/2(2(0.15)+(8-1)(-0.135))
=4(0.3+(-0.945)
=4(0.3-0.945)
=4(-0.645)
=-2.58
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