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Question
What is the difference between the 35th element and 15th element in the arithmetic progression 10, 1, -8, -17?
What is the difference between the 35th element and 15th element in the arithmetic progression 10, 1, -8, -17?
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Solution
The correct option is D -180
Given:
a = 10 d = 1− 10 = −9 T35 = a +(35 – 1) * d T35 = 10 +( 34) * (−9)T35 = − 296 T15 = 10 + 14 * (−9) T15 = − 116 T35 – T15 = − 296 – ( − 116) T35 – T15 = − 180
Given:
a = 10 d = 1− 10 = −9 T35 = a +(35 – 1) * d T35 = 10 +( 34) * (−9)T35 = − 296 T15 = 10 + 14 * (−9) T15 = − 116 T35 – T15 = − 296 – ( − 116) T35 – T15 = − 180
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