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ss7ja [257]
3 years ago
8

PLEASE HELP ASAP!!! CORRECT ANSWER ONLY PLEASE!!! What is (98 - 2n) equal to?

Mathematics
1 answer:
Vladimir79 [104]3 years ago
8 0

Answer:   946

<u>Step-by-step explanation:</u>

\sum^{11}_{1}(98-2n)\\\\a_1=98-2(1)\\.\quad=98-2\\.\quad=96\\\\a_{11}=98-2(11)\\.\quad=98-22\\.\quad=76\\\\\\S_n=\dfrac{a_1+a_{11}}{2}\cdot 11\\\\.\quad=\dfrac{96+76}{2}\cdot11\\\\.\quad=\dfrac{172}{2}\cdot11\\\\.\quad=86\cdot11\\\\.\quad=946

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