मान ज्ञात कीजिए )
Answers
Answer:
22 + 3 / 2 ( 3^11 - 1)
Step-by-step explanation:
∑_{k=1}^{11} (2 + 3^k) = (2 + 3^1) + (2 + 3^2) + (2 + 3^3) + ... + (2 + 3^11)
= 2 x 11 + ( 3^1 + 3^2 + 3^3 + ... + 3^11 )
= 22 + 3 ( 3^11 - 1 ) / 3 - 1 = 22 + 3 / 2 ( 3^11 - 1)
इसलिये, ∑_{k=1}^{11} (2 + 3^k) का मान 22 + 3/2 ( 3^11 - 1) है |
= 22 + 3 (3¹¹ - 1)/2
Step-by-step explanation:
= (2 + 3¹) + (2 + 3²) + .................................+ (2 + 3¹¹)
= 2 * 11 + 3¹ + 3² +.................................+ 3¹¹
= 22 + 3 + 3² +.................................+ 3¹¹
= 22 + S
S = 3 + 3² +.................................+ 3¹¹
प्रथम पद a =3
सार्व अनुपात = r = 3²/3 = 3
n = 11
Sₙ = a( rⁿ - 1)/(r - 1)
S₁₁= 3 (3¹¹ - 1)/(3 - 1)
S = 3 (3¹¹ - 1)/2
= 22 + 3 (3¹¹ - 1)/2
और पढ़ें
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मान ज्ञात कीजिए \sum_{k=1}^{11} (2 + 3^k))
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